// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "internal/platform/monitored_runnable.h"

#include <string>
#include <utility>

#include "absl/strings/str_cat.h"
#include "absl/time/time.h"
#include "internal/platform/implementation/system_clock.h"
#include "internal/platform/logging.h"
#include "internal/platform/pending_job_registry.h"
#include "internal/platform/runnable.h"

#define SET_THREAD_STATUS(NAME)

namespace nearby {
namespace {
absl::Duration kMinReportedStartDelay = absl::Seconds(5);
absl::Duration kMinReportedTaskDuration = absl::Seconds(10);
}  // namespace

MonitoredRunnable::MonitoredRunnable(Runnable&& runnable)
    : MonitoredRunnable(absl::StrCat("Task_", absl::Hex(this)),
                        std::move(runnable)) {}

MonitoredRunnable::MonitoredRunnable(const std::string& name,
                                     Runnable&& runnable)
    : name_{name}, runnable_{std::move(runnable)} {
  VLOG(1) << "Task: \"" << name_ << "\" scheduled";
  PendingJobRegistry::GetInstance().AddPendingJob(name_, post_time_);
}

void MonitoredRunnable::operator()() {
  SET_THREAD_STATUS(name_.c_str());
  absl::Time start_time = SystemClock::ElapsedRealtime();
  absl::Duration start_delay = start_time - post_time_;
  if (start_delay >= kMinReportedStartDelay) {
    LOG(INFO) << "Task: \"" << name_ << "\" started after " << start_delay;
  } else {
    VLOG(1) << "Task: \"" << name_ << "\" started after " << start_delay;
  }
  PendingJobRegistry::GetInstance().RemovePendingJob(name_, post_time_);
  PendingJobRegistry::GetInstance().AddRunningJob(name_, post_time_);
  runnable_();
  absl::Duration task_duration = SystemClock::ElapsedRealtime() - start_time;
  if (task_duration >= kMinReportedTaskDuration) {
    LOG(INFO) << "Task: \"" << name_ << "\" finished after " << task_duration;
  } else {
    VLOG(1) << "Task: \"" << name_ << "\" finished after " << task_duration;
  }
  PendingJobRegistry::GetInstance().RemoveRunningJob(name_, post_time_);
  PendingJobRegistry::GetInstance().ListJobs();
}

}  // namespace nearby